﻿using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Drawing;
using System.IO;
using System.IO.Compression;
using System.Text;

namespace Rail.Commons
{
    public class StringEx
    {
        public static string GetRandomString()
        {
            return GetRandomString(32, false, false, true, false, "");
        }

        ///<summary>
        ///生成随机字符串
        ///</summary>
        ///<param name="length">目标字符串的长度</param>
        ///<param name="useNum">是否包含数字，1=包含，默认为包含</param>
        ///<param name="useLow">是否包含小写字母，1=包含，默认为包含</param>
        ///<param name="useUpp">是否包含大写字母，1=包含，默认为包含</param>
        ///<param name="useSpe">是否包含特殊字符，1=包含，默认为不包含</param>
        ///<param name="custom">要包含的自定义字符，直接输入要包含的字符列表</param>
        ///<returns>指定长度的随机字符串</returns>
        public static string GetRandomString(int length, bool useNum, bool useLow, bool useUpp, bool useSpe, string custom)
        {
            byte[] b = new byte[4];
            new System.Security.Cryptography.RNGCryptoServiceProvider().GetBytes(b);
            Random r = new Random(BitConverter.ToInt32(b, 0));
            string s = null, str = custom;
            if (useNum == true) { str += "0123456789"; }
            if (useLow == true) { str += "abcdefghijklmnopqrstuvwxyz"; }
            if (useUpp == true) { str += "ABCDEFGHIJKLMNOPQRSTUVWXYZ"; }
            if (useSpe == true) { str += "!\"#$%&'()*+,-./:;<=>?@[\\]^_`{|}~"; }
            for (int i = 0; i < length; i++)
            {
                s += str.Substring(r.Next(0, str.Length - 1), 1);
            }
            return s;
        }

        /// <summary>
        /// 字符串压缩
        /// </summary>
        /// <param name="strSource"></param>
        /// <returns></returns>
        public static byte[] Compress(byte[] data)
        {
            try
            {
                MemoryStream ms = new MemoryStream();
                GZipStream zip = new GZipStream(ms, CompressionMode.Compress, true);
                zip.Write(data, 0, data.Length);
                zip.Close();
                byte[] buffer = new byte[ms.Length];
                ms.Position = 0;
                ms.Read(buffer, 0, buffer.Length);
                ms.Close();
                return buffer;
            }
            catch (Exception e)
            {
                throw new Exception(e.Message);
            }
        }

        /// <summary>
        /// 字符串解压缩
        /// </summary>
        /// <param name="strSource"></param>
        /// <returns></returns>
        public static byte[] Decompress(byte[] data)
        {
            try
            {
                MemoryStream ms = new MemoryStream(data);
                GZipStream zip = new GZipStream(ms, CompressionMode.Decompress, true);
                MemoryStream msreader = new MemoryStream();
                byte[] buffer = new byte[0x1000];
                while (true)
                {
                    int reader = zip.Read(buffer, 0, buffer.Length);
                    if (reader <= 0)
                    {
                        break;
                    }
                    msreader.Write(buffer, 0, reader);
                }
                zip.Close();
                ms.Close();
                msreader.Position = 0;
                buffer = msreader.ToArray();
                msreader.Close();
                return buffer;
            }
            catch (Exception e)
            {
                throw new Exception(e.Message);
            }
        }

        public static string CompressString(string str)
        {
            string compressString = "";
            byte[] compressBeforeByte = Encoding.GetEncoding("UTF-8").GetBytes(str);
            byte[] compressAfterByte = Compress(compressBeforeByte);
            //compressString = Encoding.GetEncoding("UTF-8").GetString(compressAfterByte);
            compressString = Convert.ToBase64String(compressAfterByte);
            return compressString;
        }

        public static string DecompressString(string str)
        {
            string compressString = "";
            //byte[] compressBeforeByte = Encoding.GetEncoding("UTF-8").GetBytes(str);
            byte[] compressBeforeByte = Convert.FromBase64String(str);
            byte[] compressAfterByte = Decompress(compressBeforeByte);
            compressString = Encoding.GetEncoding("UTF-8").GetString(compressAfterByte);
            return compressString;
        }

        /// <summary>
        /// 获取枚举描述信息
        /// </summary>
        /// <typeparam name="T"></typeparam>
        /// <param name="eunmObj"></param>
        /// <returns></returns>
        public static string GetEnumDescription<T>(T eunmObj)
        {
            //获取枚举对象的枚举类型
            var type = eunmObj.GetType();
            //通过反射获取该枚举类型的所有属性
            var fieldInfos = type.GetFields();

            foreach (var field in fieldInfos)
            {
                //不是参数obj,就直接跳过
                if (field.Name != eunmObj.ToString())
                {
                    continue;
                }
                //取出参数obj的自定义属性
                if (!field.IsDefined(typeof(DescriptionAttribute), true)) continue;
                var descriptionAttribute = field.GetCustomAttributes(typeof(DescriptionAttribute),
                    true)[0] as DescriptionAttribute;
                if (descriptionAttribute != null)
                    return descriptionAttribute.Description;
            }
            return eunmObj.ToString();
        }

        public static List<string> ColorsToString(List<Color> colorList)
        {
            List<string> RGBList = new List<string>();
            foreach (Color color in colorList)
            {
                RGBList.Add(color.R.ToString() + "," + color.G.ToString() + "," + color.B.ToString());
            }
            return RGBList;
        }
    }
}